/Engine/Source/Runtime/Landscape/Classes/LandscapeHeightfieldCollisionComponent.h
Populates a supplied array with the heights from the heightfield. Samples are placed in a tile defined by the starting point (Offset) and the stride/row
bool FillHeightTile ( [TArrayView](API\Runtime\Core\Containers\TArrayView)< float > Heights, int32 Offset, int32 Stride ) const